//package com.dxy.yesas2020goals.study.partone.disignpattern.observerpattern.mouseevent.core;
//
//import com.gupaoedu.vip.pattern.observer.mouseevent.core.Event;
//
///**
// * 观察者抽象
// * Created by Tom.
// */
//public interface EventListener {
//
//}
